baiter



(No Model.)

C. E.. BAUER.

BoLsTBR.

No. 593,410'. u Patented Nov. 9, 1897.

17M xv lill/II,

v @fill/0100 (GDL/.; 3

n: ce. morrmo., WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

CARL E. BAUER, OF CHICAGO, ILLINOIS, ASSIGNOR TO `WILLIAM V. KELLY, OF SAME PLACE;

BOLSTER.

SPECIFICATION forming part of Letters Patent No. 593,410, dated November 9, 1897.

Appiimion tied July 21, 1897. Serial No. 645,370. (No model.)

T0 all whom t may concern:

Be it known that I, CARL E. BAUER, a citizen of the United States, residing in Chicago, Cook county, Illinois, have invented certain new and useful.Improvements in Bolsters, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates particularly to the form of bolster shown in Patent Nojf/ISI, issued August 11, 1896, t0 WV. II. Marshall. It has been found that bolsters of the abovementioned form when subjected t0 anV excessive load in a testing-machine give Way first by a splitting of the Web of the compression member at its ends just at the side edges of the plate tension member and by a downward bending of the Web at that point. The first of the objects of my present invention is to overcome this difficulty, and this I aim to accomplish byv the introduction at each end of the bolster of a strengthening-piece constructed to avoid splitting of the Web of the compression member and to transmit a portion of the strain of the tension member to the sides or flanges of such compressionA member. In the form of construction vshown in the patent referred to it has also been found by severe test that when the Web of the compression member is comparatively thin the abruptness of the bend in the tension-plate at its ends weakens it somewhat at that point. By the use of the strengtheningpiece already referred to this bend is made less abrupt, and the strengthening-piece being formed, preferably, with a curved outer edge the bend is more even as Well as of larger diameter, all of which points help to minimize the effect of the objection last mentioned.

A further object of my invention is to s0 form the parts of the bolster as to make the length of the truss less in proportion to its depth, thereby greatly increasing its strength, and to so arrange the ends of the same as to canse the lines of force to meet at a point more nearly in a line With the point of support, thereby securing the best possible practical results.

A still further object of my invention and one which follows as a consequence of the introduction of the several novel and useful features already enumerated is to. secure a greater amount of strength than has been possible heretofore witha like Weight of material, or else to secure the same amount otstrength with lighter material, thereby saving in cost of construction and lightening the unprofitable or light load of the Whole car.

My invention will now be better understood by an examination of the accompanying draiv- 6o hold it more securely in place, is constructed to overlap the web of the channel and bear against the end of the same. The outer edge of Athe lstrengthening piece is preferably 'strengthening-piece 7 in order to stiffen and 7o formed of an approximately semieylindrical 7 5 shape to make a more gradual and even bend of the tension member around it. By extending the ends of the strengthening or lling piece out above the flanges of the channel, as shown in Fig. 2, a portion of the strain 8o of the tension member is transmitted to the flanges, and all possibility of splitting of the Web of the compression member is thereby avoided.

In order to bring the meeting-point of the lines of, force nearer to the center of the bolster, (the effect of Which is the same as increasing the depth of the truss in proportion to its length,) I bend the compression member so that it and the tension member will 9o meet at a point approximately just over the place of support, Which is generally inavertical line through the center of the arch-bar, (see the line a a, Fig. 1,) instead of at the extreme end of the compression member, as in the prior construction. At or near the place of meeting of the two members of the truss I place a rivet 8, or a plurality thereof, to hold the tWo members from pulling apart.

While the greatest strength is secured by roo keeping the tension member straight clear to the beginning of the curve at its end, and

this is the plan I prefer to follow in the practice of my invention, it is clear that this might be slightly changed (the tension member being bent and the compression member remaining straight at its ends) Without departing from the spirit of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is I 1. In a bolster, the combination With its compression member, tension member, and middle support; of a strengthening piece around which the end of the tension member is bent, substantially as described.

2. In a bolster, the combination wit-l1 its compression member, tension member, and middle support; of a strengthening piece placed between the end of said compression member and thebentmp portion of the tension member, substantially as described.

3. In a bolster, the combination with its compression member, tension member, and middle support; of a strengthening-piece arranged between the end of the compression member and the bent-up portion of the tension member, and having its ends projecting out over the ianges of said compression member, substantially as described.

4. In a bolster, the combination with its and a tension member, the said compression member being bent upward near its ends in a line with said tension member, and the tension member being straight at its ends to the end of the compression member, substantially as described.

CARL E. BAUER. Vitnesses:

JAS. O. PHELPs, PAUL SYNNEsTvEDT.

Disclaimer in Letters Patent No. 593,41()I l lIJISGLJQLILmER 593,L10. -Ca'rl E. Bauer, Chicago, Ill. BOLSTER. Patent dated November 9, 1897. Disclaimer filed February 16, 1910, by the assignee, Smplem Railway Apple'- ance Company.

Enters its diselaimerv l To all that part of the specification of said patent which reads as follows While the greatest strength is secured by keeping the tension member straight clear to the beginning of the curve at its end, and this is the plan I prefer to ollow` in the practice of my invention, it is clear that this might be slightly changed (the tension member being bent and the compression member remaining straight at its ends) Without departing from the spirit of my invention.-[Oji0al Gazette, E95- raarg/ QQ, 1.910.] 

